Hi Steven

Thank you for your response to my problem.

Any suggestion? What you say is that I would be better off without that 1:1
balun? Yes, now I have it at 66feet each leg for a total of 132 feet but now
it is not at the best height but kinda sagging and lopping where it is but
off the ground and about 2 feet above the roof and other obstacles. I also
have it presently close to steel guy wires and the tower itself. What would
be my problem then here now? You believe it is my balun? I was hoping to get
this up there and then leave it. All this climbing is difficult. Do you
believe that once I get it up there, with the coax, with the dipole, no
balun, do you think that would allow me better results with a good antenna
tuner? Any advice is greatly appreciated.

Thank you
BOb







" Stephen Cowell" wrote in message
m...

"Bob" wrote in message
...
Hi
We have put together a dipole, each leg is 66 feet. We put a 1:1 balun
and
it is running about 60 feet of 50 ohm coax. Presently it is about half
way
up the tower it is intended for so we could check the SWR before getting
it
up to the highest point. Presently each leg has some lags and dips, no
major
bends but it is just hanging there, over some bushes and the entire
thing
is
over top of the house, and not touching anything but is very close to
some
steel guy wires (uninsulated).
Now we can only tune this down to a useable SWR on the 80m band. On all
other bands we cannot tune it down to a safe operating range. We are
using
a
good antenna tuner but cannot get anything useable except for 80m. Here
we
are able to tune the SWR right down.

Questions???
Would we be better without that balun?

If you want multi-band operation, then yes, you have to
forget the balun, or put multiple dipoles on the output lugs.
__
Steve
KI5YG
.

Bob wrote:

Hi Steven

Thank you for your response to my problem.

Any suggestion? What you say is that I would be better off without that 1:1
balun? Yes, now I have it at 66feet each leg for a total of 132 feet but now
it is not at the best height but kinda sagging and lopping where it is but
off the ground and about 2 feet above the roof and other obstacles. I also
have it presently close to steel guy wires and the tower itself. What would
be my problem then here now?

The problem is the coax.

You believe it is my balun? I was hoping to get
this up there and then leave it. All this climbing is difficult. Do you
believe that once I get it up there, with the coax, with the dipole, no
balun, do you think that would allow me better results with a good antenna
tuner? Any advice is greatly appreciated.

Feeding your dipole with ladder-line moves all the matching problems to the
hamshack where you don't have to climb anything to solve them. Try the following
configuration and get back to us on any remaining problems.

XMTR--tuner--1:1 balun/choke--100 ft. 450 ohm ladder-line---132 ft. dipole

This configuration will allow multi-band operation on most of the HF ham
bands. The problems you will have with a couple of bands are solvable.
--
73, Cecil, W5DXP



-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
-----== Over 100,000 Newsgroups - 19 Different Servers! =-----

"Bob" wrote in message
...
Hi Steven

Thank you for your response to my problem.
Any suggestion? What you say is that I would be better off without that
1:1
balun? Yes, now I have it at 66feet each leg for a total of 132 feet but
now
it is not at the best height but kinda sagging and lopping where it is but
off the ground and about 2 feet above the roof and other obstacles. I also
have it presently close to steel guy wires and the tower itself. What
would
be my problem then here now? You believe it is my balun?

The balun is basically what is limiting your multi-band
operation. At crazy impedances the balun
prevents the shield of the coax from assisting in absorbing
some of the mismatch. Others have pointed out that the
optimum situation is to feed your antenna with balanced line...
if you must use coax, and you must have multi-band operation,
then use an antenna tuner without a balun upstairs. RG58
doesn't work nearly as good as RG8... I couldn't make my
inverted vee (resonant at 3750kHz) work 15m until I switched
over to RG8. You should avoid legal-limit operation on the
higher bands with this setup, unless you like burnt coax.

I was hoping to get
this up there and then leave it. All this climbing is difficult. Do you
believe that once I get it up there, with the coax, with the dipole, no
balun, do you think that would allow me better results with a good antenna
tuner? Any advice is greatly appreciated.

Yes, the good antenna tuner is the key. Get one
with a built-in balun, so you can try balanced feedline
when you get a chance. It really is hotter, both listening
and transmitting.

You should only climb once, put up a yardarm, rope,
and pulley, and then you can play to your heart's content.
Mounting a wire antenna permanently is pure hubris,
beware!
__
Steve
KI5YG
..